981403427 has 4 divisors (see below), whose sum is σ = 982066680. Its totient is φ = 980740176.

The previous prime is 981403403. The next prime is 981403433. The reversal of 981403427 is 724304189.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981403427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981403477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329402 + ... + 332367.

It is an arithmetic number, because the mean of its divisors is an integer number (245516670).

Almost surely, 2^981403427 is an apocalyptic number.

981403427 is a deficient number, since it is larger than the sum of its proper divisors (663253).

981403427 is a wasteful number, since it uses less digits than its factorization.

981403427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663252.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 981403427 is about 31327.3590811610. The cubic root of 981403427 is about 993.7623145132.

The spelling of 981403427 in words is "nine hundred eighty-one million, four hundred three thousand, four hundred twenty-seven".